The Collaborative International Dictionary
Mesotrochal
Mesotrochal \Mes"o*tro`chal\, a. [Meso- + Gr. ? anything round, a hoop.] (Zo["o]l.) Having the middle of the body surrounded by bands of cilia; -- said of the larv[ae] of certain marine annelids.
Wiktionary
mesotrochal
a. (context zoology English) Having the middle of the body surrounded by bands of cilium; said of the larvae of certain marine annelids.